Packing ring for valves



Jan. 4, 1927.

fiumMW Patented Jan. 4, 1921.

wYrirn onmmnn Wilson, on ELIZABETH, NEW mnsnm;

PACKING RING FOR VALVES.

Application filed J'annary This invention relates to packing rings for valves. Its object is to produce a rigid, precompacted or precondensed sealing or packing ring ade up of united, dense laminae of asbestos or the like, and possessing my new features of invention set forth below.

In the accompanying drawing forming a part hereof and illustrating the invention in the best form now known to me, 1 I The ,figure is a vertical, central section showing one form of my new packin ring mounted in one form of packing ring holder in cooperative relation to one form of ported valve seat structure. I

tion the packing or sealing ring is made up of compressed or compacted, superposed, united laminae preferably of asbestos, the laminae being usually vulcanized together. This ring or annulus is made dense and stiffby the compression of the united laminae and yet is slightly elastic and very slightly compressible. It substantially retains its form under pressure, Being made of united layers, it must be ported while in use, because it softens to a considerable but'variable extent when subjected to steam or other fluid under ressur'e, the edges of the laminae in the sea mg surface then tending to separate to a greater or less degree, as is usual in the asbestos packing rings made of a strip wound upon ltself and having fiat, parallel faces, one of whlch flat faces forms a sealing surface.

In the illustrated form of the present invention, the packing or sealing ring S is made up of asbestos laminae a: compressed or compacted andv united together,-thering having the characteristics above noted. In

my new packing ring herein shown, the ring has a central opening 1 opposed clampable walls" 2 and 3; and on its s'ealin'g face side, a sealing surface 14 which is between backwardly tapered portions 5, each tapered portion '5 being between the sealing surface 4 and the clampable wall 2 or 3. The sealing surface is formed of edges of the united laminae and ,in uselcontacts with a valve seat wall. Thexta ered surfaces 5 are laminae edges, there eing at least one tapered laminaedge in each tapered portion 5. While these tapered edges perform no direct a function in sealing,they definitely Serve as sup ,orts one for the other and for the intermaiiatelaminae and. alsg serve as spacers Referring to the drawing of the inven-' kept compressed and sup 6, 1926. Serial Ro.79,568.

to hold the sealing surface 4 apart from meand clamped in position in a valve, the sealing edges in the sealing surface are given effective resistance against fraying and tearing, whereby the sealing ring is given a longer wearing life and non-leakage of the seated valves is more certainly insured than has been the case heretofore. If. the sealing edge of any one lamina becomes disrupted by fraying or tearing due to seating pressure or to pressure of liquids flowing through the valve such fray or tear is apt to extend into one or more adjacent sealing surface forming edges of the laminae and produce a leaky valve. In the present stage of technical development, the high pressure and the great velocity of travel of fluids through valves makes it very diflicult to secure and maintain valves in a non-leaking condition andthis invention is directed to overcoming the difliculty.

In" the form of the invention shown, the sealing ring is mounted in a cupped sealing ring holder 6 having a central, threaded stud 7 through a clamping plate 8 that is provided 'backwardly of its face with abevelled peripheral wall 8 that contacts with the interior, clampable wall 3 of the ring S. Clamping plate 8 is retained in clamping position by a nut 9 in turn secured in place a cotter pin 9 a- The peripheral clampale wall 2 of the ring is clamped against a side wall 6 of the cupped holder 6. The' face of the plate *8 lies within the ring back of the tapered portions 5' of the ring between which the sealing surface 4; (shown flat in Fig. 1) is located. The sealing surface 4 projects beyond the adjacent tapered surfaces 5. The latter'are intermediate of the sealing surface andthe opposed clampable surfaces 2 and 3: The back wall of the ring is in contact with the bottom of the cupped holder '6. The laminae in-the sealing surface 4 are perpendicular ,to a flat valve seat, the seat and the sealing surface being adapted for-contact to form the sealing joint.

The sealing ring S-contacts with a valve seat surrounding a port. The port is an opening through a member 15. The port wall' is indicated by T6 and the valve seat .bv 17. Features of my invention not herein chim d are set forth in my, application Ser.

No. 79,571 for lifting valves, and Ser. No. 79,574 for gate valves, both filed Jan. 6, 1926. g

What I claim is As a new article of manufacture, a dense, slightly elastic, valve port sealing annulus of unitedlaminae and which annulus has a projecting. sealing surface composed of laminae edges between adjacent, tapering laminae edges and which annulus also has clampable surfaces one adjacent each tapered laminae edge portion; the tapered laminae serving, when in use," to sustain one.

another and also to sustain the laminae edges in the sealing surface, and then also serving 15 as spacers to hold the sealing surface edges apart from clamping means for engaging said clampable surfaces, one of said clamp-i able surfaces being a peripheral wall portion and the other being an interior, conical 20 portion of the annulus. Signed at'New York in the county of New York and State of New York this 23 day -of December, A. D. 1925.

WYLIE GEMMEL WILSON. 

